Excavating machine



May 4 1926.b 1,583,327

' D. J. WALSH EXCAVATING MACHINE Filed March 23. 1925 2 SheetS-Sheei l 4Z6 Z7. J WALSH akku un Patented May 4, 1926.

IUNITED STATES PATENT OFFICE. I

DANIEL JOSEPH WYALSH, OF PITTSFIELD, MASSACHUSETTS.

i EXCAVA'IING MACH-INE.

Application led March 23, 1925. Serial No.`17,719.

ments in Excavating Machines, of which the4 following is aspecification. v

. This invention relates to excavating machines, and more particularlyto clippers therefor.

An object of the invention is the provi- 'sion of an improved dipper anddipper lid,

together with operating means for the lid. lA further object is toprovide a construction in which a portion of the lid serves to force thematerial from the dipper when the lid is swung on its pivot.

A further object of the invention is thc vprovision of meansforadjusting the angle of the shovel to the dipper stick..

In the accompanying drawings, I have shown one embodimentl of theinvention.A In this showing: l

Figure 1 is a side elevation of the dipper stick and dipper showing aportion of t'r-e main boom,

Figure 2 is a horizontal sectional viewon line' 2 2 of Figure 1,

Figure 3 is a similar view on line 3--3 ofv Figure 1, j j

Figure 4 is a side elevation of the dipper stick and dipper in aninclined position showing, .in dotted lines, the lid in open position, jI v i Figure -5 is a'horizoiital sectional view on line 5-5 of Figure 4,

Y Figure 6 is avertical sectional view on line 6 6 of Figure 5, and, jFigure 7 is aperspective view of the diper lid:

p Referring to the'drawings, the reference numeral 1 designates the mainboom of an excavating machine which is provided with a bracket orsupport 2 for a shipper 'shaft 3, which carries a pinion 4. A dipperstick 5 is mounted at an angle to themain boom and is provided with arack4 6, which meshes with the pinion 4 to vpermit movement of thedipv50 per stick vrelativeto the boom. The dipper i stick may also beswung at an angle about the shipper shaft 3 by means of a flexible cable(not shown) secured to the dipper stick l adjacent its lower end in theusual manner. As shown (sec Figures 2 and 3) the dipper stick is formedof a pair of angle irons 7 which are spaced from-each-otherand connectedat intervals by means of webs8.

A'dipper is mounted on the lower endof the dipper stick. As shown, thedipper comprises abottom 9 and side walls 10. The

bottom may be provided with longitudinal-'- ly extending members 11projecting beyond;

the front edge yof the dipper to assist` .in digging. A plateJ12 issecured t0 the 'side walls and this plate is twisted and extends acrossthe top of the dipper, as at 13. Similarly, a strap 14 is secured to theslide walls and is providedl with a portion 15 extending across the topand parallel to the extension 13. The meinbersl?)` and 15 are adapted tosupport' a pair` of longitudinally extending members 16 adjacent eachside of the dipper. The lower end of the dipper'stick is provided withearsl? yadapted to receive pins 18 which extendthrough thelongitudinally' extending member 16 to pivotally support the dippenonthe dipper stick. A strap 19 is securedto each side of the dipper stickad-i jacent the bottom and extends downwardly at an angle. The lowerends of these straps are provided with openings adapted to receive pins20, which also extend through the members 16 adjacent their rear ends.As shown, the strapsare provided with a plurality of openings 21adjacent their upper ends, and a bolt 22 is adapted to be received in aselected opening in the strap andin the dipper stick t9 support thedipper at a dea' .sired angle.

Each of thJe side walls of the'dipper is provided with an inclinedreenforcing stri 23 adjacent its rearO end. Thev dipper li consists of aIsubstantially L-sliaped member I having a top 24 adapted to .bearranged beneath the transverse members 13 and 15, and

this top is extended at right angles to form a back plateI 25, whichnormally closes the rear of the dipper. Asshown, a reenforcing plate 26may be arranged on the interior of the plate 25 and transversereenforc-A 'ing members 27 may be 'arranged on the ex- The lid isfurther provided with' terior. triangular shaped side walls 28, theforward -zes edges of which are adapted to engage the lstrips 23 whenthe lid is in closed position (see Fivure 1). Ears 29 are formed at theupper orward ends'of the side walls and these ears are adapted to beconnected to links 30, the opposite ends of whichv are con'- nected toan 'auxiliary boom `31 which is movably mounted with respect to thedipper stick and by means of which the lid may be swung to an openposition. Y The top of the lid is also provided with ears 32 which areprovided with openings 33 adaptedto receive the pins 20 to form afulcrum for the lid and permit it to swing when the auxiliary boom 31 isactuated.'

The auxiliaryfboom consists of a pair of side plates 34 (see Figures 2and 3) connected to each other atintervals by webs 35 and plates 36arearranged on the exterior of the side plates 34. These plates areprovided with. rack teeth 37. An engine 38 is mounted on` the dipperstick adJacent its lower end and is provided with a flexible conduit 39leading to the operators platform or cage. This conduit `is providedwith a suitable valve (not shown) by means of which the engine may becontrolled. The

engine is provided with a connecting rod 39, which is connected to thecrank portion 40 of a shaft 41. The shaft I41 is mounted in suitablebearings 42 on the side of the dipper'stick and is provided with apinion 43 at each end. These pinionsiare adapted to,

mesh with gears 44 arranged on opposite sides iof the dipper stick andcarried by a shaft 45. The shaft 45 is in turn provided with pinions 46,meshingwith racks 37'to permit the' auxiliary boom 31 to be `moved withrespect to the dipper stick. As shown, suitable guides 47 are secured`to the dipper stick and extend around lthe auxiliary boom to retain itin position.

` In operation, the angle of the shovel with respect to the dipper stickis adjusted.` by

means of the spaced openings 21 in the arms 19. The dipper stick 1sactuated inthe usual manner by means of the gear 4 and rack 6 and isswung around the shipper shaft 3 as a pivot /in the usual manner, tolthedesired angle.. When the lid is to be opened, the

^ auxiliary boom is moved upwardly by means of the engine 38 and the earconnecting the shaft 41 to the racks 3 .v This raises the links 30 andmoves the rear end of the lid upwardly to the `dotted line positionshown in ,Figure 4 ofthe drawings. The width of the lid is slightly lessthan the distance between the side walls `10 of the dipper and thispermits the forward end of the `lid to swing downwardlyinto the dipper,as 'indicated -in dotted lines in Figure 4 of the drawings. The lengthof the dip-per lid forwardly of the earsa32 is suicient to permit theforward end to scrape the bottom of the dipper and this facilitates theremoval of baille to l from passing over the top of the dipper andmuddyy or sticky materi/al from the dipper. AS shown, the forward end ofthe lid is curved upwardly as at 48, which acts as a prevent thematerial being dug collecting on the lid between the transverse 4members 13 and 15 andl the longitudinal members 16. These members limitthe u ward movement of the forward end of t e lid when it is returned tonormal position. A transverse member 49 is arranged between vthe sidewalls of the dipper and is adapted to be engaged by the rear portion ofthe lid to limit its downward movement. The lid is returned to normalposition by reversing the ydirection of movement of the shaft 41 and itsassociated parts( ,4

It is to be understood that the form of my invention herewith shown anddescribed is to be taken as a preferred example o-f the same, and thatvarious changes in the shape, size, and arrangement of parts mayberesorted to without departing from the spirit.

of the invention or the scope, of the sub-g1 joined claims.

I claim: v

1. .In an excavator, a dipper stick, a dip- .guides arranged on said diper stick, an

auxiliary boom mounted in said guides and movable with respect to said.dipper stick,

connections between said auxiliary boom f and said lid, a rack carriedby said auxiliary boom, and a pinion meshing with said rack'.

2. In an excavator, a dipper-stick, a dip'- per mounted on the end ofsaid diper stick, a lidpivotally mounted on sai dip-per, guides arrangedon said dip er stick, an auxiliary boom mounted in sald guides andmovable with respect to said dipper stick, connections between saidauxiliary boom and said lid, a rack carried by said auxiliary boom, ashaft mounted on said dipper stick,

apinion carried by said shaft and meshing with said rack, and an enginemounted on said dipper stick and operatively connected to said shaft. Q

3. In a device of thecharacter described, a dipper-having" side walls, abottom and having an open front,Q transverse members connecting theupper edges of said side walls,

a lid comprising a top and a rear wall, longitudinally extending membersconnecting said transverse .members and means for pivotally mountingsaid lid on said longitudinally extending members.

4. A device constructed in accordance with claim 3 wherein the portionof the top `of said lid forwardly of said pivot is substantially equalto the height of the side` wall.

5. In a device o f the character described, a dipper stick, a dippercarried thereby, said dipper comprising a body portion having sidewalls, a bottom and having an open front, a lid for said dippercomprisin a top and rear wall, longitudinally exten n members connectedto said body portion and arranged over said top, means for pivotallymounting said lid on said longitudinally extending members, an auxiliaryboom carried by said shipper shaft and movable with respect thereto, andconnections between said boom and said lid.

6. A device constructed in accordance with claim 5 wherein an engine ismounted on said dip nected to said auxilia boom.

In testimony whereo I aix m si ature.

DANIEL JSEPH w SH.

r stick and operatively con- I

